How to set horizontal scrolling to horizontal field Manager when fields are added using a loop for?

The following code snippet contains a horizontal field Manager to which are added five buttons.

1. I can't the value of horizontal scrolling to horizontal management Manager because of who I am not able to access the keys 4 and 5.

2. usually, we put horizontal scrolling in the following way:

container = new HorizontalFieldManager(USE_ALL_WIDTH|HORIZONTAL_SCROLL|HORIZONTAL_SCROLLBAR);

3. so I also tried setting of horizontal scrolling in the following way

   container = new HorizontalFieldManager(Manager.HORIZONTAL_SCROLL|Manager.HORIZONTAL_SCROLLBAR)
            {

                protected void sublayout(int maxWidth, int maxHeight) {

                    Field field = null;
                    int x = 0;
                    int y = 0;
                    int maxFieldHeight = 0;
                    int maxFieldWidth = 0;
                    for (int i = 0; i < getFieldCount(); i++)
                    {
                        field = getField(i);
                        layoutChild(field, maxWidth, maxHeight);
                        setPositionChild(field, x/*width-field.getWidth()*/,y);

                        x+=field.getWidth();

                        maxFieldWidth = maxFieldWidth + field.getWidth();
                        System.out.println("field width"+field.getWidth());
                        System.out.println(" max field width"+maxFieldWidth);

                        if(i==0)
                        {
                            maxFieldHeight = field.getHeight(); // height set of the first button since all components have the same height
                        }
                    }
                    System.out.println("final max field width"+maxFieldWidth);

                    setExtent(maxFieldWidth, maxFieldHeight);

                }
            };

but it's not working.

4 I found this property: (position) horizontalFieldManager.setHorizontalScroll; that contains the parameterioo where the post is supposed to be the new horizontal scroll position. I tried passing the coordinate x of horizontal field Manager, but it does not work. I should pass as a parameter position?

HorizontalFieldManager container = new HorizontalFieldManager()
{
    protected void sublayout(int maxWidth, int maxHeight)
    {
        Field field = null;
        int x = 0;
        int y = 0;
        int maxFieldHeight = 0;
        for (int i = 0; i < getFieldCount(); i++)
        {
            field = getField(i);
            layoutChild(field, maxWidth, maxHeight);
            setPositionChild(field, x,y);
            x+=field.getWidth();
            if(i==0)
            {
                maxFieldHeight = field.getHeight(); // height set of the first button since all components have the same height
            }
        }

        setExtent(Display.getWidth(), maxFieldHeight);

    }
};

ButtonField button1 = new ButtonField("Button1");
ButtonField button2 = new ButtonField("Button2");
ButtonField button3 = new ButtonField("Button3");
ButtonField button4 = new ButtonField("Button4");
ButtonField button5 = new ButtonField("Button5");

container.add(button1);
container.add(button2);
container.add(button3);
container.add(button4);
container.add(button5);

add(container);

Need your valuable comments and suggestions. Please help me.

I think that there is a bug in the sublayout (your HorizontalFieldManager 0 mode. Given that the code did what I think WHAT HFM will do anyway, I recommend that you try to do this with a standard HFM, using this style:

Manager.HORIZONTAL_SCROLL | Manager.HORIZONTAL_SCROLLBAR

Let us know how you go.

When I have more time I'll explain the bug, but if you want to investigate something, be aware that the maximum size that you can use in setExtent are the values that are passed to sublayout. Compare the width as you try to define in setExtent whose width is increased.

Tags: BlackBerry Developers

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